Thanks, tsuwm. Now I have another question (yes, me--imagine that): here is a partial quote from Xrefer.the illocutionary act is that of uttering it as a request; the perlocutionary act is what is accomplished by uttering it (e.g. the addressee might ignore the request, or might in fact help).
Would it be at all accurate to describe an illocutionary act as "cause", and a perlocutionary one as "effect"?